Cold water inlet control valve



Nov, 27., 1934. l L. D. Low-:K1N 1,982,582

COLD 4WATER INLET GONTROL VALVE Filed Oct. 26, 1952 #km/fas; zt/55H25, 00a/l @rf-wf.- v ay Q-gum FA SM2@ 477" /PA/Ey Patented Nov. 27, 1934 1,9s2, s2 ooLn WATER INLET CONTROL VALVE Luther D. Lovekin, Villanova, Pa., assignor to Kitson Company, Philadelphia, Pa., a `corpora.-

tion of West Virginia Application October 26, 1932, Serial No.` 639,551

6 Claims.

My invention relates to aicombination litting for application to a boiler or water heater with particular reference to a boiler or water heater permitting a back ilow of water out of the boiler 5 or heater into the cold water supply line thereof n when or if the pressure 'inside the boiler or heater abnormally rises from expansion of the heated water. l

A purpose of my invention is to combine a cold 10 water inlet tting at a boiler or heater of the character indicated with an emergency shut-off of the fuel to the boiler or heater.

A further purpose is to providea desirable form of combination double conduit fitting in l5 which the ow in one conduit of the fitting is adapted to effect a closure of flow through the other conduit thereof if the temperature of the first ow becomes unduly high.

A further purpose is to use an abnormal backing of hot water out of a boiler or heater into the cold water supply line thereof to operate an emergency shut-oil? of the fuel tothe-boiler or heater.

A further purpose is to use the abnormal inzcreased and increasing volume, of the water inside a heater of the character indicated incident to any abnormal high and increasing temperature of the water of the heater to shut oir the fuel to the heater before the heater can generate 3o steam.

Further purposes will appear in the specification and in the claims.

I have elected to show one main form only of my invention, showing however minor detail l modifications and 'selecting a main form anol` minor modifications thereof that are practical and efficient in operation and which well illustrate the principles involved.

This application is a continuation in part of 40 my co-pending application, now Patent No. 1,892,674, for a Cold water inlet control valve.

Fig. 1 is a vertical cross section through an embodiment of my invention.

Fig. 2 is a side elevation of aportion of a modification of my invention with parts in vertical cross section.

I show in Figure 1 .a particularly advantageous form of thermostatic shut down valve` using a bi-metal strip 47 as a thermostatic latch, holding open a valve 22 away from its seat 17 until or unless thermostatic expansion of the latch member 47 incident to abnormally high temperature releases the valve to snap closed responsive to the action of a spring 30. In Figure l the solid shank 1 5' that threads into one of the outlets of 'the T 12 forms a mount for the bi-metal expansion strip 47 and presents an upwardly directed cup 48 that makes threaded connection at 49 with a downwardlydirected cup 50 which has an upwardly directed shank 60 51 threading into and carrying the valve 11'.

The thermostat element 47 has one end fastened at 52 to the bottom of the cup and bends upwardly to present a hook 543 normally above an upwardly directedshoulder of a head 54 at 65 the lower end of a valve stem 21.

'I'he valve is of the globe type having inlet at 19 land outlet at 20.

The movable portion of the valve includes an assembly mounted on the stem 21', the stem 70 carrying a skirt 23', the Valve element 22', washer 42' and nut 43.

The skirt 23' is upwardly counterbored to receive the spring 30' and loosely telescopes into an upwardly directed guiding counterbore of the shank 51.

'Ihe valve assembly is spring pressed upwardly by the spring 30' which is compressed between the bottoms of the counterbores in the shank 51 and the skirt member 23'. 80

At normal temperature the thermostatic strip 47 has a position adapting the hook 53 to latch above the upwardly directed shoulder of the stem head 54, thereby holding the stem and valve assembly down againstjthe closure-pressure of the spring 30.

The valve element 22 is heldto its skirt member 23' by the washer 42' and nut 43', the stem being shown projecting somewhat upwardly at 55 in position to be engaged by the downwardly 90 directed end of a push rod 56, the push rod being axially aligned with the valve and valve stem and carried in a longitudinally bored and counterbored removable plug 57 that is normally covered by an outer cap 58.

' The push rod carries a head 59 at its lower end, a cap 60at its upper end and isspring pressed upwardly by a spring 61.

In the event of abnormally, high temperature in the member 12, the heat. transmitted by conduction through the shank 15', outwardly deiiects the thermostat element 47 to release the hook from over the upwardly directed shoulder of the valve'stem, permitting snap closure of the valve which stops the flow of fuel through the 105 valve 11 to the heater.

In resetting the valve to open position, the cap 58 is taken orf and the push rod depressed downward, which causes the tapered head 54 of the valve stem to slide past the hook which auto- 110 pressing toward closure, a casing matlcally latches back of the head, the lower temperature incident to the closure of the valve having resulted in a return of the bi-metal strip to its normal position.

Instead of using the conduction through a plug such as that shown at 15 in Figure 1 to heat the bimetallic element, the plug may be made of the character of that shown at 152 in Figure 2, where the lower wall 62 of the plug may be as thin as any normal wall of a fitting. The iltting shown is of L type, providing for cold water inlet at the bottom. Obviously, L type or another type is a mere detail.

It will be obvious that the term heater is broad enough to include not only what is normally so called, but any type of boiler or tank in which a corresponding heating function is performed.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such in so far as they fall within the reasonable spirit and scope of my invention.

I claim:

l. A double conduit fitting, a valve in one of the conduits pressed toward closure, an emergency actuated device includinga compartment having a heat conducting connection to the other conduit, a thermostatic latch in said compartment, andV connections between the latch and valve adapted to normally hold the valve open and releasing'the valve to closure at an abnormally high temperature incident to abnormally high heat in the said other conduit.

2. A T fitting, an emergency shut-off valve for said valve having a Well connecting to the T at one outlet thereof thereby providing a heat connection between the interiors of the T and well, and a thermostatic latch inside the well adapted to normally hold the vvalve open and releasing the valve if the temperature within the. well rises abnormally incident to abnormally high temperature within the T.

3. An emergency fuel shut-off valve including a conduit having inlet and outlet compartments, a wall between the compartments having an opening connecting the compartments, a valve adapted to close the opening and pressed toward its position of closure, a valve `stern, a second conduit for fluid, a chamber surrounding said stem fastened laterally to one of the compartments of said first mentioned conduit and presenting a heat conducting terminal for connection to said secondconduit for fiuid, and a thermostatic element mounted in the chamber adapted to norwhether the fitting be of and releasing the valve valve toward its position of closure, a second conduit for fluid, a chamber surrounding said stem fastened laterally to the conduit containing the compartments and presenting a heat conducting terminal for connection to said second conduit, a head on the stem within the chamber, and a thermostat mounted in the chamber adapted during normal temperature Within the chamber to latch back of the head to hold the valve open and at abnormally high temperature within the chamber to release the head to permit valve closure.

5. An emergency fuellshut-oif fitting including a conduit. having inlet and outlet compartments, a Wall between the compartments having an opening connecting the compartments, a valve adapted to close the opening, a valve stem extending from the valve in a direction laterally away from the opening, a spring pressing the valve toward its position of closure, a second conduit for fluid, a chamber surrounding said stem fastened laterally to the conduit containing the compartments and presenting a heat conducting terminal for connection to said second conduit, a head on the stem within the chamber, a thermostat mounted in the chamber adapted during normal temperature within the chamber to latch back of the head to hold the valve open and at abnormally high temperature within the chamber to release the head to permit valve closure, and a push rod mounted upon the*y side of the fitting away from the valve, spring pressed away from the valve, substantially aligned with the valve and adapted when depressed to open the closed valve for relatching the valve open.

6. A T fitting, an emergency shut-off valve comprising a casing and a valve pressed toward closure, a compartment connected at one end to one outlet of the T and connected at the other end to the valve casing and providing a heat connection between the interiors of the T and compartment, a thermostatic latch inside the compartment adapted to normally hold the valve open if the temperature within the compartment rises abnormally, incident to abnormally high temperature within the T.

LUTHER D. LOVEKIN. 

